Jan Dembowski on "[Plugin: Contact Form 7] CSS Problem"

You may get better results posting your own topic instead especially as this one is marked resolved.

http://wordpress.org/support/plugin/contact-form-7#postform

Generally speaking CSS can be applied via your theme's (child theme is better) style.css file or using a custom CSS plugin.

Edit: And stop replying to multiple resolved themes like that, you already got the answer.

http://wordpress.org/support/topic/text-alongside-contact-form?replies=8#post-4223084